ABCYA.com
http://www.abcya.com/kindergarten_computers.htm
(Sight Word Bingo, Alphabetical Order Activity)

Make a Word (Phonics for Fun Early Readers)
http://teacher.scholastic.com/clifford1/flash/vowels/index.htm

Context Clues- Millionaire Game
http://www.quia.com/rr/151544.html